20120488811 has 4 divisors (see below), whose sum is σ = 20814298800. Its totient is φ = 19426678824.

The previous prime is 20120488807. The next prime is 20120488841. The reversal of 20120488811 is 11888402102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20120488811 - 2² = 20120488807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120488841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346904951 + ... + 346905008.

It is an arithmetic number, because the mean of its divisors is an integer number (5203574700).

Almost surely, 2^20120488811 is an apocalyptic number.

20120488811 is a deficient number, since it is larger than the sum of its proper divisors (693809989).

20120488811 is an equidigital number, since it uses as much as digits as its factorization.

20120488811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693809988.

The product of its (nonzero) digits is 8192, while the sum is 35.

The spelling of 20120488811 in words is "twenty billion, one hundred twenty million, four hundred eighty-eight thousand, eight hundred eleven".